viti·ateBrE/ˈvɪʃieɪt/NAmE/ˈvɪʃieɪt/verbpresent simple - I / you / we / theyvitiateBrE/ˈvɪʃieɪt/NAmE/ˈvɪʃieɪt/present simple - he / she / itvitiatesBrE/ˈvɪʃieɪts/NAmE/ˈvɪʃieɪts/past simplevitiatedBrE/ˈvɪʃieɪtɪd/NAmE/ˈvɪʃieɪtɪd/past participlevitiatedBrE/ˈvɪʃieɪtɪd/NAmE/ˈvɪʃieɪtɪd/ -ing formvitiatingBrE/ˈvɪʃieɪtɪŋ/NAmE/ˈvɪʃieɪtɪŋ/[usually passive]~sth(formal) tospoilorreducetheeffectofsth使失效;削弱效用